Introduction to Django

Small talk I did for our local Python Group!

Transcript

1. Introduction to Django
   @myusuf3
   because who reads documentation
   

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2. What is Django?
   The D is silent.
   

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3. BlogIt
   The future of online writing, maybe.
   

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4. $ django-admin startproject blogit
   blogit
   ├── blogit
   │ ├── __init__.py
   │ ├── settings.py
   │ ├── urls.py
   │ └── wsgi.py
   └── manage.py
   

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5. $ django-admin startapp blog
   * be sure to add new app in settings file
   

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6. from django.db import models
   class Author(models.Model):
   name = models.CharField(max_length=50)
   class Blog(models.Model):
   title = models.CharField(max_length=200)
   text = models.TextField()
   pub_date = models.DateTimeField('date published', auto_now_add=True,)
   author = models.ForeignKey(Author)
   

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7. $ python manage.py makemigrations blog
   

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8. Migrations for 'blog':
   0001_initial.py:
   - Create model Author
   - Create model Blog
   

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9. $ python manage.py migrate
   

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10. Operations to perform:
    Synchronize unmigrated apps: staticfiles, messages
    Apply all migrations: admin, blog, contenttypes, auth, sessions
    Synchronizing apps without migrations:
    Creating tables...
    Running deferred SQL...
    Installing custom SQL...
    Running migrations:
    Rendering model states... DONE
    Applying blog.0001_initial... OK
    

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11. View from Top
    The steward of control
    

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12. def post(request, post_id):
    post = get_object_or_404(Blog, pk=post_id)
    return render(request, 'post.html', {'post': post})
    

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13. Templates and Rendering
    Making things look beautiful
    

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14. {{ post.title }}
    Posted: {{ post.pub_date }}
    Author: {{post.author.name}}
    
    {{post.text}}
    
    

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15. Feature Request!
    CEO has epiphany!!
    

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16. def latest(request):
    posts = Blog.objects.all()
    return render(request, 'posts.html', {'posts': posts})
    

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17. {% for post in posts %}
    {{ post.title }}
    Posted: {{ post.pub_date }}
    Author: {{post.author.name}}
    
    {{post.text}}
    
    {% endfor %}
    

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18. Requirements
    Got a list checking it twice!
    

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19. dj-database-url==0.3.0
    dj-static==0.0.6
    Django==1.8
    gevent==1.0.1
    greenlet==0.4.5
    gunicorn==19.3.0
    honcho==0.6.6
    psycopg2==2.6
    static3==0.5.1
    static==1.1.1
    

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20. What is Deploying?
    The D isn’t silent, just like in the word difficult.
    

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21. Inquiries?
    @myusuf3
    Do something magical now!
    

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